William stubblebine



W. STUBB LEBINE.

Puddling and Heamting Furnace.

No. 223,962. Patented Jan. 27, 1880.

V 759 f 1" V & J i i i% j y B m 3 a UNITED STATES N? men WILLIAM STUBBLEBINE, OF BETHLEHEM, ASSIGNOR OF ONE-HALF OF HIS RIGHT TO BERNARD O. LAUTH, OF PHILADELPHIA, PA.

PUDDLING AND HEATING FURNACE.

SPECIFICATION forming part of Letters Patent No. 223,962, dated January 2'7, 1880.

' Application filed November 12, 1879 I i To all whom it may concern:

Be it known that I, WILLIAM STUBBLE- BINE, of Bethlehem, Northampton county, Pennsylvania, have invented a new and useful Improvement in Heating and Puddlin g Furnaces, of which the following is a specification. 7

The object of my invention is to insure the maintenance of a uniform and high degree of heat in a puddling or heating furnace; and this object I attain by combining with the furnace a gas and air chamber located above the fire-chamber, and having direct communication therewith, the said gas and air chamber being provided with a valved blastpipe, all as hereinafter more fully set forth.

In the accompanying drawings, Figure 1 is a longitudinal section of a puddlingfurnace constructed for carrying out my invention, and Fig. 2 a transverse section on the line 1 2.

So far as the furnace proper is concerned it is similar to ordinary puddling-furnaces, A being the fire-chamber; B, the puddling-ehamber; D, the chimney, which should befurnished at the top with the usual adjustable damper; E, the ash-pit; a, the feed-opening for the fuel; Z), the working-opening; d, the bridge-wall f, the grate; c, the flue leading to the chimney, and g the tubular chills surrounding the puddling-bed. The openings at and b are pro 'vided with the usual doors, that of the opening b.having a working'hole, c.

On the roof h of the furnace, immediately over the fire-chamber A, is built a structure, F, inclosing a chamber, J, which communicates with the interior of the said fire-chamher through openings i in the roof h, said openings being sufficiently large and numerous to permit the free passage through them of gases from thefuel.

The usual blast-pipe m communicates with the ashpit E of the furnace, and ablast-pipe, n, serves to introduce air into the chamber J, the flow of air through said pipe n'being regulated by means of a valve or damper, s.

In working my improved furnace I introduce a very light blast into the ash-pit E instead of the usual heavy blast, thefuel being introduced into the fire-chamber A in small quantities and at frequent intervals, and the damper or valve 8 in the blast-pipe a being closed during and for a very short time after the introduction of each limited supply of fuel.

From the bituminous coal or wood employed as fuel in the class of furnaces to which my invention relates, volumes of volatile gases are evolved immediately after the fuel is thrown upon the tire, These gases are generated so rapidly and in such volume that their complete combustion cannot take place in ordinary furnaces, a large portion passing off through the chimney in the condition of smoke.

In my improved furnace, however, a portion of the gases evolved on each introduction of fresh fuel intothe fire-chamber passes up through the openingsi and is stored within the chamber J, from which, on the introduction of the blast from the pipe at, the gases, mixed with air, are gradually forced back into the tire-chamber, where the mixture is ignited and intensities the heat in the paddling-chamber. By this means a uniform and high degree of heat is maintained within the puddlingchamber, thereby enabling me to efiect a considerable saving in fuel, to work more heats than usual in a given time, and to produce from the same grade of pig-iron puddled iron of a quality much superior to that worked in an ordinary puddling-furnace.

The intervals between the firing operations and the amount of fuel introduced each time will depend upon the capacity of the chamber J and upon the condition of the metal in the puddling-chamber, the attendant being governed in the performance of the firing operation by the appearance and character of the ignited gases as they pass through the said puddling'chamber.

My invention is distinct from that class of furnaces in which I the fire-chamber. is surmounted by a blast-chamber communicating therewith through nozzles or passages for directing continuous jets of heated air into the furnace, for in my improvement the blast is cut olf until the chamber J becomes filled with gases, and it is these gases, mixed with the 1 air, which are gradually introduced into the furnace and consumed during the intervals be i, and having a valved blast-pipe, n, all substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WILLIAM STUBBLEBINE.

Witnesses:

H. O. TRUMBORE, GEO. ZIEGENFUSS. 

